Automatic pump.



G. J. SPOHRER. AUTOMATIC PUMP. APPLICATION FILED MAY17,1911.

Patented Dec. 16, 1913.

UNITED STATES PATENT OFFICE..

GRnGonY JOHN srormnn, or FRANKLIN, rnNNsYnvANIA, AssrGNon 'ro wrnsoN Moron STARTER coMrANY, or FRANKLIN, PENNSYLVANIA.

AU'rdMATIo PUMP.

VSpecication of Letters Patent.

meenten nee. 1e, 1913.

T0 oZZ 'whom t may concern Be it known that I, GREGORY J. Srormnn, a citizen'of the United States, and a resident of Franklin, in the county of Venango and State of Pennsylvania, have invented a new and Improved Automatic Pump, 'of which the following is a full, clear, and exact description.

My invention relates to a new and improved form of automatic pump and more particularly pertains to a pump adapted to work with an internal combustion engine and more particularly adapted to supply compressed fluid to an automobile, for the purpose of supplying energyto actuate 'an engine starter or to supply a source of power for any other purpose.

An object of my invention is to provide a simplified pump actuated by the pressure of the explosive discharge.

A further object of my invention is to provide a pump simple in construction and automatic in its action, comprising relatively few parts that might get out of order.

A further objectvof my invention is to provide a device to automatically control the connection between the pump and the engine, so that when the pressure of the air in the compressed air tank falls below a predetermined minimum point, the pumpwill be automatically brought into fluid 'connection with the engine, and when the pressure in the tank has reached a predetermined maximum point, the pump will be automatically disconnected from the engine.'

l attain the above outlined objects by disposing three separate cvlinders in lohgitudinal alinernent, each cylinder having a head therein. all ot said heads having a piston rod common thereto. Pressure from the engine cylinder is admittedto the motor cylinder to reciprocate the .piston rod, to draw ai'r under normal atmospheric pressure into one chamber` and to exhaust from this chamber to a smaller chamber at the opposite end of the pump, from which it is forced into the compressed air tank. The connection between the engine and the' pump iscontrolled by a' sliding valve disposed in a chamber, which valve is pressed in one direction by a compressed spring andy in the opposite direction by the pressure of the air in the tank. The tension on the spring may be varied.. so as to regulate the point ot pressure at which it is desired to open the communication between the pump and engine.

With the above and other objects in view, as will more fully hereinafter appear, the present invention consists in certain novel details of construction and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings and more particularly pointed out in the appended claims.

Reference is to be had to the accompanying drawings, ormin a part of this specification, in which similar characters of reference indicate corresponding parts in all the ligures, and in whichy Y Figure 1 is a plan view looking down upon the front part of an automobile shown in outline, having a. preferred embodiment of my invention attached thereto; and Fig. 2 is a vertical longitudinal. sectional View taken through a preferred embodiment of my invention, showing the compressed air tank in elevation.

Described more ln detail, I have 'shown an automobile A of any common construction, mounted upon which is an engine B, comprising combustion chambers orcylinders C, and disposed to one side of said lengine is a pump D which pump forms the subjectmatter o" my invention.

Leading from one side of the iston head of one ot the combustion cylin ers C, is a supply pipe 4, and leading from the opposite side of said piston head is another su ply pipe 5. These supply pipes lead to the opposite sides ofthe piston head 6 of a central cylinder 7 of the pump D. The piston rod 8 carrying the head 6 extends through the central chamber 7 in opposite directions, and has attached to one end a head 9 mov- Ving in an air-receiving ,cylinder 10 in prolongation of the cylinder 7 but Vseparated therefrom by a partition 11. The opposite end of the piston rod 8 has an air compression head 12 reciprocating in an air com ression cylinder 13 disposed in axial ainement with the cylinders 7 and 10 but of a smaller' diamctcrlthan these two cylinders.

The outer end of the cylinder 10 is ope into which opening is t readed a plug l said plug having an air inlet 15 controlled by au inwardly-movin ball valve 16, normalty closing the air 1nlet15 by means of a. compression spring 17. Also disposed in lli) liti

the plug 14 is an outlet 18, normally kept closed by a ball valve 19 actuated by a compression spring 2 0. compression spring 2O is carried by anipple 21, secured to which nipple is one end 22 of a pipe 23 leading outside the pump to an inlet 24 disposed in a plug 25 closing the outer end of the cylinder 13. 'llhe inlet 24 is controlled by a ball valve 26 similar in construction to the valve 19.

Leading from the cylinder 13 is a normally closed outlet 27 controlled by an outwardly-moving ball valve 28, to Whichoutlet 27 is connected a compressed air tank 29 by means of a pipe connection 30. The pressure in the compressed air tank is indicated by any form' of pressure indicator 3l.

instead ot leading directly to the cylinder.7,'the supply-pipes 4 and 5 terminate in a cylinder 32, in which cylinder moves a slide/33 havin spaced apertures extending therethroug these .apertures being adapted to register with the outlets of the pipes 4 and 5 and the passageways 35 leadmg into the cylinder 7 von opposite sides of the head 6. llt will be seen that when the ends of the supply pipes 4 and 5 and the 'apertures 34 and passageways 35 are in alinement, communication is established between thepump and combustion chambers of the engine. @ne end 36 of the cylinder 32 is connected to the compressed air tank 29 by means ot a pipe 37. The'tendency of the compressed air in the tank 29 will be ot course to force the slide 33 to the left, as shown in lFig. 2, to thereby close the communication betwen the engine and the pump. Acting in the opposite direction to restore the apertures 34 into alined position vvith the passageways 3,5, is a spring 38 positioned in the cylinder 32, one end of which bears against the slide'33, the opposite and outer end otvvhich bears against the head 39 of a bolt 40, Which'bolt is in screw-threaded enga ement with a cap 41 closing the' end 42 o the cylinder 32. llt will be seen that by rotating the bolt 40, the tension on the spring 38 may be increasedto force the slide 33 against the head 43 closingthe opposite.

end of the cylinder 32, to bring the apertures 34 into alinement with the ends ot the ipes 4 and 5 and With the passagevvays 35. y this construction, it will bev noted that when the pressure ot the air in the tank 29 is sumcient to overcome the action of the spring 38, the slide 33 will be torced into the position shown in iF ig. 2, thereby disconnesting the engine :trom the pump.

lin order to retain the slide 33 somewhat permanently either in the position shown 1n 2 or inthe position 1n Which'the apertures 34 are in alinement With the pipes 4 and 5, there is positioned inthe lower' side et the slide 33, a pair ot spaced recesses 43, in one ot which recesses is adapted The outer Vend of the' noemen.

to be disposedrtheY nose 44 of one of a pair of pins 45, which pins are controlled by a compression spring 46, the tension of Which spring is regulated by a screvvl cap 47. lt will be seen by this construction that the slide 33 is held in one of two positionsuntil the spring 38 or the pressure from the tank 29 is sufficient to overcome the action of the spring 46, to force the slide 33 in the other of its tyvo positions. I

'lracmgv but the cycle 'of movement from the position of the members shown in Fig.

2, the exploded gas under pressure from the engine Will be admitted through the pipe 4 into the left side of the head 6,' forcing this head to the right through the chamber 7. 'lhis will carry the head 9 in the same direction and will of course Atend tov create a vacuum to the left of the head 9. The external air pressure will then be sutlicient to 'overcome the pressure of the spring 17,

opening the valve .16, and air will be ad- 'mittedthrough the air inlet 15 into the cvlcompressiongcylinder 13. Illhe next stroke` of the piston rod 8 will' torce the air from the cylinder 13 through the outlet 27, through the connection 30 into the compressed air tank 29, and this cycle of operan tion is repeated until the desired compression as denoted by the indicator'31 is ob'- tained in the tank 29; then by reversing the slide 33, the pump is disconnected from the engine. 'lhe compressed air in the tank 29 may be used for any purpose, but in this particular case has been designed to actuate an engine starter described in detail in a co-pending application. ln orderI to slow down the head 6 as it approaches the end of its stroke, there is disposed in the side of the cylinder 7, a pair ot yspaced passages 48 controlled by ball valves 49, said passages being positioned adjacent the center of the cylinder, so that as the piston moves to the lett, tor example, and uncovers the adjacent passages as it approaches ythe end of the stroke, the actuating fluid in the cylinder 7 will flow through this passage past the valve 49 therein, and thence through theauxiliary passage 50 leading-trom the valve back to the cylinff between the piston and the 'adjacent der head, thereby forming a cushn ion'pre nting the piston head 6 :tr-om strik ing the end. of the cylinder.

Having thus described my intention, l

iis I claim as new and desire to secure by Letters Patent:

l. The combination with a cylinder and a piston therein, of a control valve comprising a casing having a pair of longitudinally spaced inlets, a pair of similarly disposed outlets diametrically opposite to said inlets. and leading to the opposite ends of said cylinder from said casing, whereby motive fluid received from said inlets in alternation may be delivered to and act upon the opposite ends of said piston in alternation, a slide having a pair of spaced apertures extending therethrough, said slide being movable longitudinally in said casing, one cxtreme position of said slide placing said inlets in communication with said outlets,a spring housed Within said casing and bearing on one end of said slide, and a compressed iuid inlet at the end of the casing opposite said spring.

2. In a device of the character set forth, the combination with a cylinder and a re ciprocatin piston therein, of a control valve for the cy inder comprising a casing having a pair of spaced inlets on one side, pipes leading to said inlets from independent sources, said casing having on-its opposite side a pair of ports leading to opposite ends of the cylinder, and a slide movable in said casing and having a pair of passageways serving in one position of the slide to cause registry between said inlets and said passageways each to each whereby communication may be had from said pipes to the opposite ends of the cylinder, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GREGORY JOHN SPOHRER.

litnesses:

WINIFRED JOHNSON, N. F. OSMER. 

